Craig Mayer, Nick WIlliams, Vojtech Huser
Lister Hill National Center for Biomedical Communications, National Library of Medicine, NIH, Bethesda, MD

See the full regCTG repository at https://github.com/lhncbc/CRI/tree/master/regCTG

To return to the list of conditions and view other reports go to https://lhncbc.github.io/CRI/regCTG/regCTG-condition_report_links.html


Study Counts

Type Study_count
Total_Studies 3814
interventional 3330
Observational 457
Registry 27

Studies over Time

```

Interventional Trials

Intervention Type

intervention_type Study_Count
Drug 1385
Drug|Other 204
Drug|Radiation 164
Biological 155
Procedure 152
Biological|Drug 122
Drug|Procedure 120
Drug|placebo 114
Radiation 100
Biological|Drug|Other 96
Other 78
Device 65
Biological|Other 53
Drug|Procedure|Radiation 42
Drug|Other|Procedure 32
Drug|Other|placebo 28
Procedure|Radiation 28
Drug|Other|Radiation 25
Device|Drug 21
Diagnostic Test 19
Combination Product 18
Biological|Drug|Radiation 15
Drug|Other|Procedure|Radiation 15
Other|Procedure 14
Other|Radiation 14
Behavioral 12
Biological|Other|Radiation 12
Dietary Supplement 12
Biological|Drug|Procedure 11
Biological|Other|Procedure 11
Biological|Procedure 11
Behavioral|Other 9
Biological|Drug|Other|Radiation 9
Biological|placebo 9
Genetic 9
Biological|Drug|Other|placebo 8
Biological|Radiation 8
Device|Procedure 8
Biological|Drug|Other|Procedure 6
Biological|Drug|placebo 6
Combination Product|Drug 6
Dietary Supplement|placebo 6
Biological|Drug|Other|Procedure|Radiation 5
Device|Other 4
Drug|placebo|Procedure 4
Other|Procedure|Radiation 4
Behavioral|Drug 3
Biological|Other|placebo 3
Biological|Other|Procedure|Radiation 3
Device|Drug|Procedure 3
Device|Radiation 3
Dietary Supplement|Other 3
Drug|Genetic|Other|Procedure 3
Drug|placebo|Radiation 3
placebo|Procedure 3
Behavioral|Other|Procedure 2
Biological|Device 2
Biological|Device|Drug 2
Biological|Drug|placebo|Radiation 2
Biological|Drug|Procedure|Radiation 2
Device|placebo 2
Diagnostic Test|Drug 2
Dietary Supplement|Drug 2
Dietary Supplement|Drug|Other 2
Dietary Supplement|Other|placebo|Procedure 2
Drug|Genetic 2
Drug|Other|placebo|Procedure 2
Drug|Other|placebo|Radiation 2
Behavioral|Dietary Supplement 1
Behavioral|Dietary Supplement|Other 1
Behavioral|Drug|placebo 1
Behavioral|Other|Procedure|Radiation 1
Behavioral|placebo 1
Behavioral|Radiation 1
Biological|Device|Drug|Other 1
Biological|Diagnostic Test 1
Biological|Dietary Supplement|Drug|Procedure|Radiation 1
Biological|Drug|Genetic 1
Biological|Drug|Other|placebo|Procedure 1
Biological|Drug|placebo|Procedure 1
Biological|Genetic 1
Biological|Procedure|Radiation 1
Combination Product|Other|Procedure 1
Combination Product|placebo 1
Combination Product|Procedure 1
Device|Drug|Radiation 1
Device|Other|Radiation 1
Diagnostic Test|Drug|Procedure 1
Diagnostic Test|Drug|Radiation 1
Dietary Supplement|Drug|placebo 1
Dietary Supplement|Drug|Procedure 1
Dietary Supplement|Other|Procedure 1
Dietary Supplement|Procedure 1
Dietary Supplement|Radiation 1
Drug|Genetic|Other|Radiation 1
Drug|Genetic|Procedure 1

Count of Studies by Intervention (normalized and mapped)

Interventions over Time

Weekly studies for each intervention

Studies by Country

Country Study_Count
United States 1516
China 454
France 116
Korea, Republic of 84
NA 82
Canada 78
Germany 61
United States|Canada 60
Taiwan 50
Italy 43
Netherlands 40
Japan 32
United Kingdom 28
Spain 26
Belgium 20
Hong Kong 19
Denmark 16
Australia 15
India 13
United States|Puerto Rico 13
Brazil 11
Russian Federation 10
Singapore 10
Austria 9
Switzerland 9
United States|Spain 9
Israel 8
Egypt 6
Norway 6
China|Korea, Republic of|Taiwan 5
Sweden 5
United States|Canada|Puerto Rico 5
United States|Germany 5
Austria|Germany 4
Japan|Korea, Republic of 4
United States|Canada|Korea, Republic of 4
Australia|New Zealand 3
Saudi Arabia 3
Sudan 3
Thailand 3
United States|Belgium 3
United States|Canada|Japan|Korea, Republic of 3
United States|France|Spain 3
United States|Korea, Republic of 3
United States|South Africa 3
United States|Taiwan 3
United States|United Kingdom 3
Belgium|France 2
Czech Republic 2
Denmark|Sweden 2
Finland 2
France|Germany|Spain 2
Germany|Switzerland 2
Greece 2
Korea, Republic of|Taiwan 2
Netherlands|United Kingdom 2
Pakistan 2
Philippines 2
United States|Australia 2
United States|Australia|Canada 2
United States|Australia|Canada|New Zealand|Puerto Rico 2
United States|Canada|Israel 2
United States|Canada|United Kingdom 2
United States|China|Singapore 2
United States|France 2
United States|Germany|Italy 2
United States|Japan 2
United States|Japan|Korea, Republic of 2
United States|Netherlands 2
United States|Peru 2
United States|Singapore 2
Algeria|Brazil|China|France|India|Indonesia|Italy|Korea, Republic of|Mexico|Morocco|Philippines|Thailand|Tunisia|Turkey 1
Algeria|Egypt|India|Jordan|Lebanon|Russian Federation|Saudi Arabia|South Africa|Thailand|Tunisia 1
Algeria|Morocco|Tunisia 1
Argentina 1
Argentina|Australia|Austria|Belgium|Bosnia and Herzegovina|Brazil|Bulgaria|Canada|Colombia|Croatia|Czechia|Denmark|Finland|France|Germany|Greece|Hungary|Ireland|Israel|Italy|Lithuania|Mexico|Netherlands|New Zealand|Norway|Poland|Portugal|Romania|Russian Federation|Serbia|Slovakia|Slovenia|Spain|Sweden|Switzerland|Turkey|United Kingdom 1
Argentina|Australia|Austria|Brazil|Chile|China|Czech Republic|Estonia|Greece|Hong Kong|India|Ireland|Italy|Korea, Republic of|Latvia|Lithuania|Mexico|New Zealand|Pakistan|Poland|Russian Federation|Slovakia|Tunisia|Ukraine|United Kingdom 1
Argentina|Australia|Austria|Brazil|Chile|China|Czech Republic|Estonia|Italy|Korea, Republic of|Latvia|Lithuania|New Zealand|Pakistan|Poland|Russian Federation|Slovakia|Tunisia|Ukraine|United Kingdom 1
Argentina|Cuba|India|Indonesia|Pakistan|Philippines|South Africa|Thailand|Uruguay 1
Australia|Austria|Denmark|Germany|Netherlands|United Kingdom 1
Australia|Belarus|Brazil|Bulgaria|Chile|China|Colombia|Czechia|Georgia|Greece|Hungary|Jordan|Lebanon|Malaysia|Mexico|Philippines|Poland|Romania|Russian Federation|Spain|Taiwan|Thailand|Turkey|Ukraine 1
Australia|Belgium|China|Germany|Japan|Singapore|Spain 1
Australia|Canada 1
Australia|Canada|Japan 1
Australia|New Zealand|Poland|Russian Federation|Thailand 1
Australia|Russian Federation 1
Australia|United States|Argentina|Belgium|Brazil|Bulgaria|Chile|Croatia|Czechia|France|Georgia|Germany|Hungary|Israel|Italy|Japan|Korea, Republic of|Poland|Romania|Russian Federation|Serbia|Spain|Taiwan|Ukraine 1
Austria|Belgium|Canada|Germany 1
Austria|Belgium|Czechia|Denmark|Germany|Ireland|Netherlands|United Kingdom 1
Austria|Belgium|Czechia|France|Germany|Italy|Spain|United Kingdom 1
Austria|Belgium|Finland|France|Italy|Sweden|United Kingdom 1
Austria|Bulgaria|Germany|Hungary|Poland|Romania|Slovakia|Spain|Switzerland|United Kingdom 1
Austria|Czech Republic|France|Germany|Russian Federation|United Kingdom 1
Austria|France|Germany 1
Austria|France|Germany|Hungary|Netherlands|Poland|Romania|United Kingdom 1
Austria|France|Germany|Switzerland 1
Austria|France|Italy|Poland 1
Austria|Germany|Korea, Republic of|Switzerland 1
Austria|Germany|Netherlands 1
Austria|Germany|Netherlands|Poland|Slovenia 1
Austria|Germany|Switzerland 1
Austria|Switzerland 1
Bangladesh 1
Belarus|Hungary|Poland|Russian Federation|Ukraine 1
Belgium|Bulgaria|Germany|Hungary|Latvia|Poland|Romania|Serbia|United Kingdom 1
Belgium|Canada|Australia|France|Ireland|Italy|Netherlands|New Zealand|Singapore|Switzerland|United Kingdom 1
Belgium|Canada|France|Spain|United Kingdom 1
Belgium|Czechia|France|Germany|Netherlands|Spain|United Kingdom 1
Belgium|Denmark 1
Belgium|Denmark|France|Germany|Italy|Netherlands|Poland|Spain|Sweden|Switzerland|United Kingdom 1
Belgium|France|Germany 1
Belgium|France|Germany|Italy|Poland|Spain 1
Belgium|France|Italy|United Kingdom 1
Belgium|France|Netherlands 1
Belgium|France|Netherlands|Spain|Switzerland|United Kingdom 1
Belgium|France|Switzerland|United Kingdom 1
Belgium|Germany|Italy|Spain|United Kingdom 1
Belgium|Italy 1
Belgium|Luxembourg 1
Belgium|United States|Australia|France|Germany|Greece|Hungary|Italy|Korea, Republic of|Romania|Russian Federation|Spain|Taiwan|Ukraine 1
Belgium|United States|Canada|France|Italy|Poland|Spain|United Kingdom 1
Bulgaria|Canada|India|Russian Federation|Slovakia|South Africa|Spain 1
Bulgaria|Romania|Russian Federation|Ukraine|United Kingdom 1
Canada|China|France|Germany|Hong Kong|Italy|Korea, Republic of|Taiwan 1
Canada|United States|Argentina|Australia|Belgium|Brazil|Bulgaria|Chile|Croatia|France|Germany|Greece|Israel|Italy|Mexico|New Zealand|Peru|Poland|Romania|Russian Federation|Spain|Switzerland|United Kingdom 1
Canada|United States|Australia|France|Germany|Israel|Mexico|Norway|Spain|United Kingdom 1
China|France|Germany|Italy|Poland|Spain|Taiwan|United Kingdom 1
China|Hong Kong|Japan|Korea, Republic of|Singapore|Taiwan|Thailand 1
China|Hong Kong|Korea, Republic of|Malaysia|Taiwan 1
China|Hong Kong|Korea, Republic of|Taiwan 1
China|Hong Kong|Korea, Republic of|Taiwan|Thailand 1
China|Hong Kong|Singapore|Taiwan|Thailand 1
China|Japan|Korea, Republic of 1
China|Korea, Republic of 1
China|Korea, Republic of|Taiwan|Thailand 1
China|Taiwan|Thailand 1
China|United States|Argentina|Australia|Austria|Belgium|Brazil|Bulgaria|Canada|Chile|France|Germany|Greece|Hong Kong|Italy|Japan|Korea, Republic of|Mexico|New Zealand|Portugal|Romania|Russian Federation|Singapore|Spain|Sweden|Switzerland|Taiwan|United Kingdom 1
China|United States|Argentina|Australia|Austria|Belgium|Brazil|Canada|Chile|Colombia|France|Germany|Hong Kong|Italy|Japan|Korea, Republic of|Mexico|Netherlands|New Zealand|Puerto Rico|Romania|Russian Federation|Singapore|Spain|Taiwan|United Kingdom 1
Croatia 1
Croatia|Hong Kong|India|Korea, Republic of|Malaysia|Philippines|Poland|Serbia|Singapore|Sweden|Thailand 1
Cuba 1
Czech Republic|France|Netherlands|United Kingdom 1
Czech Republic|Germany|Netherlands 1
Czechia|France|Germany|Italy|Poland|Spain 1
Denmark|Finland|France|Italy|Japan|Norway|Spain|Sweden 1
Denmark|France|Germany|Greece|Italy|Netherlands|Spain|Sweden|United Kingdom 1
Denmark|Germany|Norway|Sweden|United Kingdom 1
Finland|France|Germany|Italy|United Kingdom 1
France|Germany|Italy|Poland|United Kingdom 1
France|Germany|Italy|Spain 1
France|Germany|United States|Australia|Austria|Italy|Netherlands|Sweden 1
France|Greece|India|Peru|Spain 1
France|Korea, Republic of|Taiwan 1
France|Martinique 1
France|Monaco 1
France|Netherlands|Spain|United Kingdom 1
France|Spain 1
France|Switzerland 1
France|United Kingdom 1
France|United States|Argentina|Austria|Chile|Czechia|Greece|Italy|Mexico|Poland|Portugal|Romania|Russian Federation|Spain 1
France|United States|Australia|Austria|Belgium|Brazil|Bulgaria|Canada|Czech Republic|Finland|Germany|Hong Kong|Hungary|Israel|Italy|Japan|Korea, Republic of|Netherlands|Norway|Philippines|Portugal|Romania|Spain|Sweden|Switzerland|Taiwan|Thailand 1
France|United States|Australia|Austria|Belgium|Canada|China|Czechia|Germany|Hong Kong|Israel|Italy|Japan|Korea, Republic of|Poland|Russian Federation|Singapore|Spain|Sweden|Switzerland|Taiwan|United Kingdom 1
France|United States|Belgium|China|Germany|Hong Kong|Italy|Korea, Republic of|Netherlands|Singapore|Spain|Taiwan|United Kingdom 1
Germany|Hungary|Poland|Spain|Ukraine 1
Germany|Italy 1
Germany|Italy|Korea, Republic of|Spain 1
Germany|Italy|Spain 1
Germany|Netherlands 1
Germany|Spain 1
Germany|United States|Argentina|Australia|Austria|Belgium|Brazil|Canada|France|Italy|Netherlands|New Zealand|Portugal|Spain|Sweden|Switzerland 1
Germany|United States|Belgium|Italy|Spain|United Kingdom 1
Greece|Israel|Italy 1
Greece|Spain|Switzerland 1
Hong Kong|Japan|Korea, Republic of|Taiwan 1
Hong Kong|Korea, Republic of 1
Hong Kong|Korea, Republic of|Malaysia|Philippines|Singapore|Taiwan|Thailand 1
Hong Kong|Korea, Republic of|Singapore|Taiwan 1
Hong Kong|Singapore 1
Hong Kong|Singapore|Taiwan 1
Hong Kong|Taiwan|Thailand 1
Hong Kong|United States|Belgium|Brazil|Czech Republic|Egypt|France|Germany|Hungary|Italy|Korea, Republic of|Netherlands|Russian Federation|Singapore|South Africa|Spain|Switzerland|Taiwan|Thailand|Turkey|United Kingdom 1
India|Russian Federation|Ukraine 1
Indonesia 1
Ireland 1
Ireland|Sweden 1
Israel|United States 1
Israel|United States|Australia|Canada|Denmark|France|Germany|Hungary|Ireland|Italy|Japan|Korea, Republic of|Netherlands|Russian Federation|Spain|Taiwan|Turkey|United Kingdom 1
Italy|United States|Argentina|Australia|Austria|Canada|Chile|China|Denmark|Finland|France|Germany|Hungary|Korea, Republic of|Netherlands|Singapore|Spain|Sweden|Switzerland|United Kingdom 1
Italy|United States|Australia|Belgium|Brazil|Canada|France|Germany|Ireland|Japan|New Zealand|Poland|Russian Federation|Spain|United Kingdom 1
Italy|United States|Austria|Belgium|Canada|France|Germany|Greece|Spain|Switzerland 1
Italy|United States|Austria|Belgium|Egypt|France|Germany|Hungary|Lebanon|Spain|Turkey 1
Japan|United States|Argentina|Australia|Canada|China|France|Hong Kong|Italy|Korea, Republic of|Spain|Taiwan|Thailand 1
Korea, Republic of|Malaysia|Myanmar|Singapore 1
Korea, Republic of|United Kingdom 1
Korea, Republic of|United States|Canada|France|Germany|Hong Kong|Taiwan 1
Kuwait 1
Lithuania 1
Malaysia 1
Mexico 1
Mongolia 1
Netherlands|Norway|Spain 1
Netherlands|Spain|Switzerland 1
New Zealand 1
New Zealand|United Kingdom 1
Norway|Sweden 1
Palestinian Territory, occupied 1
Philippines|United States|Australia|Belgium|Canada|Denmark|France|Greece|Indonesia|Italy|Korea, Republic of|Poland|Russian Federation|Spain|Thailand|United Kingdom 1
Poland 1
Poland|Spain|Sweden|United States|Austria|Belgium|Canada|France|Israel|Norway|United Kingdom 1
Portugal|United States|Australia 1
Russian Federation|United States|France|Germany|Poland|Ukraine|United Kingdom 1
South Africa|United States|Argentina|Australia|Belgium|Brazil|Canada|Chile|Colombia|Czech Republic|France|Germany|Hong Kong|Hungary|India|Italy|Korea, Republic of|Malaysia|Mexico|Netherlands|Poland|Portugal|Russian Federation|Serbia|Singapore|Slovakia|Spain|Taiwan|Ukraine|United Kingdom 1
Spain|Taiwan|United States|Australia|Austria|Belgium|Brazil|Bulgaria|Canada|Chile|China|Colombia|France|Germany|Greece|Hong Kong|Israel|Italy|Korea, Republic of|New Zealand|Peru|Poland|Russian Federation|Singapore|South Africa|United Kingdom 1
Spain|United States|Australia|Austria|Belgium|Canada|China|France|Germany|Italy|Korea, Republic of|Singapore|Taiwan 1
Spain|United States|Belgium|Canada|Czechia|Denmark|France|Germany|Hungary|Italy|Poland|United Kingdom 1
Taiwan|China 1
Taiwan|United States|Argentina|Austria|Canada|Chile|China|Denmark|France|Germany|Greece|Hungary|India|Ireland|Italy|Korea, Republic of|Mexico|Netherlands|Portugal|Singapore|Spain|Turkey|United Kingdom 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Canada|Chile|China|Colombia|Czechia|France|Germany|Italy|Japan|Mexico|Netherlands|Poland|Romania|Russian Federation|Singapore|Spain|United Kingdom 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Canada|Chile|China|Czechia|Denmark|France|Germany|Ireland|Israel|Italy|Japan|Korea, Republic of|Netherlands|Poland|Russian Federation|Serbia|Spain|Taiwan|Thailand|Turkey|Ukraine|United Kingdom 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Canada|Chile|China|France|Germany|Greece|Hong Kong|Italy|Japan|Korea, Republic of|Poland|Puerto Rico|Romania|Russian Federation|Singapore|Spain|Switzerland|Taiwan|United Kingdom 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Canada|Chile|Colombia|Czechia|Denmark|Finland|France|Germany|Hungary|Ireland|Israel|Italy|Japan|Korea, Republic of|Mexico|Netherlands|Poland|Spain|Sweden|Taiwan|Turkey|United Kingdom 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Canada|Chile|Czechia|Finland|France|Germany|Hong Kong|Hungary|Israel|Italy|Korea, Republic of|Mexico|Netherlands|New Zealand|Poland|Singapore|Spain|Taiwan|United Kingdom 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Canada|China|Colombia|Czechia|France|Georgia|Germany|Hong Kong|Hungary|Ireland|Israel|Italy|Korea, Republic of|Mexico|Netherlands|New Zealand|Philippines|Poland|Romania|Russian Federation|Singapore|Spain|Switzerland|Taiwan|Thailand|Turkey|Ukraine|United Kingdom 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Canada|Colombia|Czech Republic|France|Germany|Greece|Hungary|Israel|Italy|Japan|Korea, Republic of|Netherlands|Norway|Poland|Saudi Arabia|Slovakia|Spain|Sweden|Switzerland|Thailand|United Kingdom 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Canada|Czechia|Denmark|Finland|France|Germany|Greece|Ireland|Israel|Italy|Japan|Norway|Poland|Romania|Russian Federation|Spain|Sweden|United Kingdom 1
United States|Argentina|Australia|Austria|Belgium|Brazil|China|Czechia|France|Germany|Hungary|Italy|Japan|Korea, Republic of|Netherlands|Russian Federation|Singapore|Spain|Switzerland|Taiwan|United Kingdom 1
United States|Argentina|Australia|Austria|Belgium|Canada|China|France|Germany|Hong Kong|Israel|Italy|Korea, Republic of|Mexico|Netherlands|Peru|Philippines|Singapore|Spain|Taiwan|Thailand|United Kingdom 1
United States|Argentina|Australia|Belgium|Brazil|Canada|China|Czech Republic|France|Germany|Hong Kong|India|Italy|Japan|Korea, Republic of|Mexico|Poland|Puerto Rico|Russian Federation|South Africa|Spain|Sweden|Taiwan|Thailand|Turkey|United Kingdom 1
United States|Argentina|Australia|Belgium|Brazil|Canada|Colombia|France|Germany|Hong Kong|Korea, Republic of|Mexico|Philippines|Singapore|Spain|Taiwan|United Kingdom 1
United States|Argentina|Australia|Belgium|Brazil|Canada|Croatia|Czech Republic|Estonia|Greece|India|Israel|Italy|Latvia|Lithuania|Malaysia|Netherlands|Norway|Russian Federation|Slovenia|South Africa|Spain|Sweden|Thailand|United Kingdom 1
United States|Argentina|Australia|Belgium|Canada|China|Denmark|France|Germany|Hong Kong|Hungary|Ireland|Israel|Italy|Japan|Korea, Republic of|Malaysia|New Zealand|Norway|Poland|Russian Federation|Spain|Sweden|Switzerland|Taiwan|Thailand|Turkey|Ukraine|United Kingdom 1
United States|Argentina|Australia|Belgium|Canada|France|Germany|Italy|Netherlands|Spain|Sweden 1
United States|Argentina|Australia|Brazil|Canada|Chile|Colombia|Czechia|Finland|France|Germany|Ireland|Italy|Japan|Korea, Republic of|Netherlands|Poland|Russian Federation|Spain|Taiwan|United Kingdom 1
United States|Argentina|Australia|Brazil|Canada|Colombia|France|Germany|Greece|Hungary|Israel|Italy|Mexico|Norway|Portugal|Romania|Russian Federation|Spain|United Kingdom 1
United States|Argentina|Australia|Brazil|Chile|China|Colombia|Hong Kong|Mexico|New Zealand|Peru|Russian Federation|Singapore 1
United States|Argentina|Australia|Brazil|Chile|Czechia|Germany|Greece|Israel|Italy|Japan|Mexico|Poland|Romania|Russian Federation|Spain|Turkey|United Kingdom 1
United States|Argentina|Australia|Canada|Czech Republic|Former Serbia and Montenegro|Germany|Greece|Hungary|Italy|Latvia|Lithuania|Mexico|Netherlands|Poland|Russian Federation|Serbia|Slovakia|South Africa|Spain|Sweden|Taiwan|Turkey|Ukraine|United Kingdom| 1
United States|Argentina|Australia|Canada|Denmark|France|Germany|Hungary|Israel|Italy|Japan|Korea, Republic of|Netherlands|Poland|Russian Federation|Spain|Taiwan|Turkey|United Kingdom 1
United States|Argentina|Australia|Canada|Germany|Israel|Korea, Republic of|Norway|Poland|Romania|Russian Federation|Spain|Sweden|Taiwan 1
United States|Argentina|Austria|Belgium|Brazil|Canada|France|Germany|Israel|Italy|Japan|Korea, Republic of|Lebanon|Mexico|Netherlands|Norway|Poland|Russian Federation|Singapore|Spain|Sweden|Switzerland|Taiwan|Turkey|United Kingdom 1
United States|Argentina|Austria|Belgium|Brazil|Czechia|Denmark|France|Germany|Greece|Israel|Italy|Japan|Mexico|Russian Federation|South Africa|Spain|Sweden|Switzerland 1
United States|Argentina|Austria|Brazil|Bulgaria|China|Czechia|France|Germany|Hungary|Israel|Italy|Japan|Korea, Republic of|Netherlands|Poland|Romania|Russian Federation|Slovakia|Spain|Taiwan|Turkey|Ukraine 1
United States|Argentina|Austria|Canada|Chile|Czechia|France|Germany|Hungary|Spain|United Kingdom 1
United States|Argentina|Belgium|Brazil|Canada|France|Germany|Israel|Italy|Netherlands|Spain|Turkey 1
United States|Argentina|Belgium|Croatia|France|Spain 1
United States|Argentina|Brazil|Bulgaria|China|Russian Federation 1
United States|Argentina|Brazil|Canada|France|Germany|Hong Kong|Italy|Japan|Korea, Republic of|Netherlands|Spain|Switzerland|Taiwan|United Kingdom 1
United States|Argentina|Bulgaria|Canada|Chile|Czechia|France|Hungary|India|Italy|Poland|Romania|Russian Federation|Serbia|Ukraine|United Kingdom 1
United States|Argentina|Canada|Hong Kong|Russian Federation|United Kingdom 1
United States|Australia|Austria|Belgium|Brazil|Canada|China|Czechia|France|Germany|Hong Kong|Israel|Italy|Japan|Korea, Republic of|Poland|Spain|Switzerland|Taiwan|United Kingdom 1
United States|Australia|Austria|Belgium|Brazil|Canada|China|Czechia|France|Germany|Hong Kong|Italy|Japan|Korea, Republic of|Mexico|Netherlands|New Zealand|Peru|Poland|Russian Federation|Singapore|Spain|Taiwan|Thailand|Turkey 1
United States|Australia|Austria|Belgium|Brazil|Canada|Colombia|Czechia|France|Germany|Israel|Italy|Japan|Korea, Republic of|Netherlands|New Zealand|Poland|Spain|Taiwan|Turkey|United Kingdom 1
United States|Australia|Austria|Belgium|Canada|Chile|Czechia|Germany|Hong Kong|Israel|Italy|Japan|Korea, Republic of|Singapore|Spain|Taiwan|United Kingdom 1
United States|Australia|Austria|Belgium|Canada|China|Czechia|Denmark|Finland|France|Germany|Hong Kong|Hungary|Ireland|Israel|Italy|Japan|Korea, Republic of|Netherlands|Poland|Portugal|Russian Federation|Singapore|Slovakia|Spain|Sweden|Switzerland|Taiwan|United Kingdom 1
United States|Australia|Austria|Belgium|Canada|China|France|Germany|Greece|Hong Kong|Hungary|Israel|Italy|Japan|Korea, Republic of|Spain|Taiwan|Thailand 1
United States|Australia|Austria|Belgium|Canada|China|France|Germany|Greece|Hungary|Ireland|Israel|Italy|Japan|Korea, Republic of|Poland|Portugal|Russian Federation|Spain|Switzerland|Taiwan|United Kingdom 1
United States|Australia|Austria|Belgium|Canada|Czechia|France|Germany|Greece|Ireland|Israel|Italy|Japan|Korea, Republic of|Netherlands|Poland|Russian Federation|Spain|Switzerland|United Kingdom 1
United States|Australia|Austria|Belgium|Canada|France|Germany|Italy|Japan|Netherlands|Spain|Sweden|United Kingdom 1
United States|Australia|Austria|Belgium|Canada|France|Greece|Italy|Spain|Switzerland|United Kingdom 1
United States|Australia|Austria|Brazil|Canada|China|France|Germany|Hong Kong|Italy|Japan|Korea, Republic of|Peru|Puerto Rico|Taiwan|Thailand|Turkey 1
United States|Australia|Austria|Canada|Denmark|France|Germany|Hong Kong|Italy|Korea, Republic of|Luxembourg|Netherlands|Norway|Singapore|Spain|Sweden|Switzerland|Taiwan|United Kingdom 1
United States|Australia|Austria|Canada|France|Greece|Indonesia|Italy|Korea, Republic of|Philippines|Singapore|Spain|Sweden|Switzerland|Thailand 1
United States|Australia|Austria|Canada|Hungary|Italy|Japan|Korea, Republic of|Poland|Portugal|Spain|Taiwan|Turkey|United Kingdom 1
United States|Australia|Belgium 1
United States|Australia|Belgium|Bosnia and Herzegovina|Brazil|Canada|Chile|China|Czechia|Estonia|Finland|Georgia|Greece|Hong Kong|Israel|Italy|Japan|Korea, Republic of|Malaysia|Mexico|Netherlands|Poland|Portugal|Romania|Russian Federation|Serbia|Singapore|Slovenia|South Africa|Spain|Taiwan|Thailand|Turkey|Ukraine|United Kingdom 1
United States|Australia|Belgium|Brazil|Canada|Chile|France|Germany|Hong Kong|Ireland|Israel|Italy|Japan|Korea, Republic of|Malaysia|Netherlands|New Zealand|Spain|Taiwan|Thailand|Turkey 1
United States|Australia|Belgium|Brazil|Canada|China|France|Germany|Hong Kong|Hungary|Israel|Italy|Japan|Korea, Republic of|Netherlands|Poland|Romania|Russian Federation|Spain|Sweden|Taiwan|Thailand|Turkey|Ukraine|Vietnam 1
United States|Australia|Belgium|Brazil|Canada|China|France|Germany|Hungary|India|Italy|Japan|Korea, Republic of|Poland|Portugal|Russian Federation|South Africa|Spain|Taiwan|Thailand|Turkey|Ukraine|United Kingdom 1
United States|Australia|Belgium|Brazil|Canada|Greece|Italy|Japan|Korea, Republic of|Poland|Russian Federation|Spain|Taiwan|United Kingdom 1
United States|Australia|Belgium|Canada|China|Czechia|Finland|France|Germany|Greece|Israel|Italy|Japan|Korea, Republic of|Netherlands|Poland|Russian Federation|Serbia|Spain|Switzerland|Taiwan|Turkey|Ukraine|United Kingdom 1
United States|Australia|Belgium|Canada|China|France|Germany|Hong Kong|Israel|Italy|Japan|Korea, Republic of|Malaysia|Philippines|Poland|Russian Federation|Singapore|Spain|Taiwan|Thailand|United Kingdom 1
United States|Australia|Belgium|Canada|Czechia|France|Georgia|Germany|Hungary|Israel|Korea, Republic of|Malaysia|Spain|Taiwan|United Kingdom 1
United States|Australia|Belgium|Canada|Denmark|France|Germany|Greece|Hungary|Israel|Italy|Japan|Korea, Republic of|Mexico|Netherlands|Poland|Romania|Russian Federation|Spain|Taiwan|Turkey|Ukraine|United Kingdom 1
United States|Australia|Belgium|Canada|France|Germany|Greece|Hungary|Italy|Spain|Switzerland|United Kingdom 1
United States|Australia|Belgium|Canada|France|Germany|Hong Kong|Ireland|Italy|Korea, Republic of|Netherlands|New Zealand|Poland|Romania|Singapore|Spain|Taiwan|Turkey|United Kingdom 1
United States|Australia|Belgium|China|Czech Republic|Hong Kong|Israel|Taiwan 1
United States|Australia|Belgium|China|Czechia|France|Germany|Italy|Japan|Korea, Republic of|Poland|Romania|Russian Federation|Spain|Taiwan|United Kingdom 1
United States|Australia|Belgium|France|Germany|Israel|Italy|New Zealand|Poland|Spain|Switzerland 1
United States|Australia|Belgium|France|Germany|United Kingdom 1
United States|Australia|Bosnia and Herzegovina|Brazil|Canada|Czechia|Denmark|France|Germany|Italy|Japan|Korea, Republic of|Mexico|Poland|Russian Federation|Singapore|Spain|Taiwan|Thailand|Turkey|United Kingdom 1
United States|Australia|Brazil|Canada|Chile|France|Germany|Hungary|Ireland|Italy|Japan|Korea, Republic of|New Zealand|Norway|Russian Federation|Spain|Taiwan|Turkey|Ukraine|United Kingdom 1
United States|Australia|Brazil|Canada|China|France|Hong Kong|India|Italy|Japan|Korea, Republic of|Mexico|Russian Federation|Singapore|Spain|Taiwan|Thailand|Vietnam 1
United States|Australia|Brazil|Canada|France|Germany|Italy|Poland|Russian Federation|Spain|United Kingdom 1
United States|Australia|Canada|Chile|China|Colombia|France|Germany|Ireland|Italy|Japan|Korea, Republic of|Mexico|New Zealand|Poland|Russian Federation|Spain|Taiwan|Thailand|Turkey|United Kingdom 1
United States|Australia|Canada|China|Czechia|France|Germany|Hong Kong|Italy|Japan|Korea, Republic of|Poland|Russian Federation|Singapore|Spain|Taiwan|United Kingdom 1
United States|Australia|Canada|China|France|Germany|Hong Kong|Israel|Italy|Korea, Republic of|New Zealand|Portugal|Singapore|Taiwan|Thailand|United Kingdom 1
United States|Australia|Canada|China|Germany|Ireland|Italy|Japan|Korea, Republic of|Netherlands|Spain|Sweden|Taiwan|United Kingdom 1
United States|Australia|Canada|China|Hong Kong|Puerto Rico|Singapore|Taiwan 1
United States|Australia|Canada|Czechia|Finland|Greece|Italy|Korea, Republic of|Netherlands|Poland|Portugal|Romania|Russian Federation|Spain|Taiwan|United Kingdom 1
United States|Australia|Canada|Czechia|France|Germany|Hungary|Italy|Poland|Spain|Switzerland|United Kingdom 1
United States|Australia|Canada|France|Germany|Italy|Japan|Netherlands|Poland|Spain 1
United States|Australia|Canada|France|Germany|Italy|Netherlands|Poland|United Kingdom 1
United States|Australia|Canada|France|Italy|New Zealand|Spain|Sweden 1
United States|Australia|Canada|Hong Kong|Korea, Republic of 1
United States|Australia|Canada|Japan|New Zealand|Puerto Rico|Saudi Arabia 1
United States|Australia|Canada|Japan|Norway 1
United States|Australia|Canada|Puerto Rico 1
United States|Australia|Chile 1
United States|Australia|China|Singapore|Taiwan 1
United States|Australia|Colombia|Denmark|Israel|Korea, Republic of|New Zealand|Taiwan|Turkey|Ukraine 1
United States|Australia|France|Germany|Italy|Japan|Spain 1
United States|Australia|France|Germany|Italy|New Zealand|Spain 1
United States|Australia|France|Germany|Italy|New Zealand|Spain|United Kingdom 1
United States|Australia|France|Germany|Spain 1
United States|Australia|France|Italy|Japan 1
United States|Australia|France|Korea, Republic of|Netherlands|Spain|United Kingdom 1
United States|Australia|Korea, Republic of 1
United States|Australia|Korea, Republic of|Taiwan 1
United States|Australia|Singapore 1
United States|Australia|Taiwan 1
United States|Austria|Belarus|Bosnia and Herzegovina|Canada|Croatia|France|Hungary|India|Israel|Italy|Malaysia|Poland|Romania|Russian Federation|Serbia|Spain|Sri Lanka|Taiwan|Thailand|Turkey|Ukraine|United Kingdom 1
United States|Austria|Belgium|China|Czechia|France|Germany|Hong Kong|Hungary|Israel|Italy|Japan|Korea, Republic of|New Zealand|Singapore|Spain|Switzerland|Taiwan|Thailand|Turkey|United Kingdom 1
United States|Austria|Belgium|Czechia|France|Germany|Hong Kong|Hungary|Italy|Japan|Korea, Republic of|New Zealand|Spain|Switzerland|Taiwan|Thailand|United Kingdom 1
United States|Austria|Canada|France|Germany|Italy|Mexico|Netherlands|Russian Federation|Spain 1
United States|Austria|Czechia|Germany|Lithuania|Poland|Slovakia|Taiwan 1
United States|Austria|France|Germany|Italy|Japan|Korea, Republic of|Spain 1
United States|Austria|France|Hungary|Italy|Poland|Romania|Spain 1
United States|Austria|Israel|Korea, Republic of|Norway|Spain 1
United States|Belgium|Canada|China|France|Germany|Italy|Korea, Republic of|Netherlands|Singapore|Spain|United Kingdom 1
United States|Belgium|Canada|Czechia|France|Georgia|Germany|Hungary|Israel|Korea, Republic of|Malaysia|Spain|Taiwan|United Kingdom 1
United States|Belgium|Canada|Denmark|France|Germany|Italy|Netherlands|Spain|United Kingdom 1
United States|Belgium|Canada|France|Germany|Greece|Hungary|Italy|Poland|Russian Federation|Slovenia|Spain|United Kingdom 1
United States|Belgium|Canada|France|Greece|Hungary|Iceland|Israel|Italy|Netherlands|Poland|Portugal|Spain|United Kingdom 1
United States|Belgium|Canada|France|Italy|Korea, Republic of|Singapore|Spain|Taiwan 1
United States|Belgium|Canada|Germany|Italy 1
United States|Belgium|Canada|Hong Kong|Korea, Republic of|Singapore|Spain|Taiwan|United Kingdom 1
United States|Belgium|Canada|Italy|Spain 1
United States|Belgium|Canada|Spain 1
United States|Belgium|China|France|Germany|Hong Kong|Hungary|Italy|Japan|Korea, Republic of|Slovakia|Taiwan|United Kingdom 1
United States|Belgium|China|France|Germany|Italy|Japan|Korea, Republic of|Spain|Taiwan|United Kingdom 1
United States|Belgium|Czech Republic|France|Hungary|Poland|Slovakia|United Kingdom 1
United States|Belgium|Czech Republic|Germany|India|Poland|Serbia|Taiwan 1
United States|Belgium|Denmark|France|Germany|Israel|Italy|Japan|Netherlands|Spain|United Kingdom 1
United States|Belgium|Finland|France|Germany|Hong Kong|Italy|Japan|Korea, Republic of|Spain|Switzerland 1
United States|Belgium|Finland|Japan|Spain 1
United States|Belgium|France|Germany 1
United States|Belgium|France|Germany|Greece|Italy|Korea, Republic of|Netherlands|Spain|United Kingdom 1
United States|Belgium|France|Germany|Hong Kong|Italy|Japan|Korea, Republic of|New Zealand|Singapore|Spain|Taiwan|United Kingdom 1
United States|Belgium|France|Germany|Italy|Netherlands|Spain|United Kingdom 1
United States|Belgium|France|Germany|Italy|Spain|United Kingdom 1
United States|Belgium|France|Greece|Italy 1
United States|Belgium|France|Israel|Italy 1
United States|Belgium|France|Italy|Spain|United Kingdom 1
United States|Belgium|France|Spain 1
United States|Belgium|France|Spain|United Kingdom 1
United States|Belgium|Italy|Spain|Ukraine|United Kingdom 1
United States|Brazil|Canada|China|France|Germany|Hong Kong|India|Italy|Japan|Korea, Republic of|Russian Federation|Spain|Taiwan|Thailand|Ukraine|Vietnam 1
United States|Brazil|France|Italy|Korea, Republic of|Russian Federation|Ukraine 1
United States|Bulgaria|Canada|Chile|Czech Republic|France|Hungary|India|Italy|Poland|Romania|Russian Federation|Serbia|Ukraine|United Kingdom 1
United States|Bulgaria|Hungary|Romania 1
United States|Bulgaria|Israel|Romania|Serbia 1
United States|Bulgaria|Korea, Republic of|Malaysia|Poland|Russian Federation|Ukraine 1
United States|Canada|Belgium|Denmark|Netherlands|Switzerland 1
United States|Canada|China 1
United States|Canada|China|Germany|Hong Kong|Italy|Korea, Republic of|Malaysia|Philippines|Singapore|Spain|Taiwan|Thailand|Vietnam 1
United States|Canada|China|Hong Kong|Italy|Japan|Korea, Republic of|Malaysia|Philippines|Taiwan|Thailand 1
United States|Canada|China|Korea, Republic of|Singapore|Taiwan 1
United States|Canada|Colombia|France|Ireland|Korea, Republic of|Mexico|Puerto Rico|Saudi Arabia|Spain 1
United States|Canada|Czechia|France|Italy|Poland|Spain|United Kingdom 1
United States|Canada|Denmark|France|Germany|Italy|Korea, Republic of|Spain|United Kingdom 1
United States|Canada|Finland|Italy 1
United States|Canada|France 1
United States|Canada|France|Germany|Hong Kong|Italy|Japan|Korea, Republic of|Puerto Rico|Singapore|Spain|Taiwan|United Kingdom 1
United States|Canada|France|Germany|Italy|Netherlands|United Kingdom 1
United States|Canada|France|Germany|Italy|Spain|United Kingdom 1
United States|Canada|France|Germany|Netherlands|United Kingdom 1
United States|Canada|France|Greece|Italy|Singapore|Spain|Taiwan|Tunisia 1
United States|Canada|France|Israel|Netherlands|United Kingdom 1
United States|Canada|France|Japan|Korea, Republic of|Poland|Spain|Taiwan|Turkey 1
United States|Canada|Germany|Hong Kong|Italy|Japan|Spain|Taiwan 1
United States|Canada|Germany|Israel|Italy|Spain 1
United States|Canada|Hong Kong|Italy|Korea, Republic of|Puerto Rico|Spain|Taiwan|United Kingdom 1
United States|Canada|Hungary|India|Netherlands|Poland|Serbia|United Kingdom 1
United States|Canada|Ireland|Peru|South Africa 1
United States|Canada|Ireland|Saudi Arabia 1
United States|Canada|Japan|Korea, Republic of|Puerto Rico 1
United States|Canada|Korea, Republic of|Puerto Rico 1
United States|Canada|Korea, Republic of|Spain|Taiwan 1
United States|Canada|Netherlands|Russian Federation 1
United States|Canada|Singapore 1
United States|Canada|Singapore|Taiwan 1
United States|Canada|Spain 1
United States|Canada|Switzerland 1
United States|Chile|Denmark|Estonia|Hungary|Korea, Republic of|Russian Federation|Taiwan|Turkey 1
United States|Chile|Korea, Republic of|Norway|Spain|Turkey|Ukraine 1
United States|China 1
United States|China|Czechia|France|Germany|Italy|Japan|Poland|Spain|Taiwan|United Kingdom 1
United States|China|France|Germany|Hong Kong|Italy|Korea, Republic of|Singapore|Spain|Switzerland|Taiwan|United Kingdom 1
United States|China|France|Hong Kong|Singapore 1
United States|China|France|Hong Kong|Singapore|Taiwan|Thailand 1
United States|China|Hong Kong|Italy|Japan|Korea, Republic of|Singapore|Spain|Taiwan 1
United States|China|Hong Kong|Taiwan 1
United States|China|Italy|Korea, Republic of|Taiwan|United Kingdom 1
United States|China|Japan|Singapore 1
United States|Czechia|France|Germany|Italy|Poland|Romania|Spain|United Kingdom 1
United States|Czechia|France|Hungary|Latvia|Poland|Spain|Sweden|United Kingdom 1
United States|Czechia|France|Italy|Poland|Serbia|Spain 1
United States|Czechia|Germany|Japan|Russian Federation|Spain 1
United States|Czechia|Hungary|Italy|Japan|Korea, Republic of|Mexico|Poland|Romania|Russian Federation|Serbia|Slovakia|Spain|Taiwan|Ukraine 1
United States|Czechia|Hungary|United Kingdom 1
United States|Czechia|Poland|Spain|United Kingdom 1
United States|Denmark|France|Germany 1
United States|Denmark|France|United Kingdom 1
United States|France|Germany 1
United States|France|Germany|Greece|Netherlands|Sweden|Switzerland 1
United States|France|Germany|Hungary|Italy|Netherlands|Norway|Poland|Romania|Russian Federation|United Kingdom 1
United States|France|Germany|Israel|Netherlands|Spain 1
United States|France|Germany|Italy|Netherlands|Spain|Switzerland|United Kingdom 1
United States|France|Germany|Italy|Spain|United Kingdom 1
United States|France|Germany|Japan|Spain|United Kingdom 1
United States|France|Germany|Spain|United Kingdom 1
United States|France|Greece|Korea, Republic of|Spain|United Kingdom 1
United States|France|Hong Kong|Korea, Republic of|Malaysia|Philippines|Singapore|Taiwan 1
United States|France|Italy|Japan|Korea, Republic of|Poland|Russian Federation|Spain|Taiwan|Turkey 1
United States|France|Italy|Japan|Russian Federation|Spain|United Kingdom 1
United States|France|Italy|Spain 1
United States|France|Korea, Republic of|Spain|Turkey 1
United States|France|Netherlands|Spain 1
United States|France|Taiwan|United Kingdom 1
United States|Germany|Hong Kong|Japan 1
United States|Germany|Hungary|Sweden|Switzerland 1
United States|Germany|Poland|Puerto Rico|Romania|Russian Federation|Ukraine 1
United States|Germany|Spain 1
United States|Hong Kong|Korea, Republic of|Taiwan 1
United States|Hong Kong|Singapore|Taiwan 1
United States|Hong Kong|Taiwan 1
United States|Hungary|Poland|Russian Federation|Serbia|Spain|Ukraine 1
United States|India|United Kingdom 1
United States|Israel 1
United States|Israel|Spain 1
United States|Italy|Korea, Republic of|Poland|Spain 1
United States|Italy|Spain 1
United States|Italy|Taiwan|United Kingdom 1
United States|Japan|Korea, Republic of|Spain|Taiwan 1
United States|Japan|Korea, Republic of|Taiwan 1
United States|Korea, Republic of|Spain|United Kingdom 1
United States|Korea, Republic of|Ukraine|United Kingdom 1
United States|Malaysia|Singapore|Taiwan|Thailand 1
United States|Mexico 1
United States|Norway|United Kingdom 1
United States|Puerto Rico|South Africa 1
United States|Singapore|Taiwan|United Kingdom 1
United States|United Kingdom|Argentina|Australia|Brazil|Canada|Denmark|France|Germany|Hong Kong|Italy|Korea, Republic of|Mexico|Netherlands|Peru|Spain|Taiwan|Thailand|Turkey 1
Vietnam 1

Sites per Study

Site_count Study_Count
1 1740
2 220
3 171
4 100
5 96
6 69
7 68
8 57
9 39
10 50
11 37
12 23
13 31
14 24
15 26
16 17
17 21
18 12
19 10
20 18
21 14
22 16
23 15
24 14
25 10
26 11
27 5
28 15
29 7
30 8
31 1
32 7
33 8
34 4
35 10
36 5
37 7
38 5
39 5
40 5
41 6
42 3
43 5
44 4
45 2
48 1
49 6
51 6
52 1
53 4
54 2
55 4
57 2
58 3
59 3
60 2
61 3
62 2
63 1
64 3
65 3
66 2
67 2
68 1
69 1
70 1
71 1
72 3
73 1
75 5
76 2
77 3
78 2
79 1
81 1
82 1
84 2
86 2
87 1
91 2
92 3
93 2
94 2
95 2
96 1
97 2
98 1
100 1
101 2
103 2
104 1
105 1
106 2
107 1
108 5
110 1
111 1
112 1
113 3
116 1
117 1
118 1
120 1
124 2
125 2
127 1
128 1
130 1
131 3
133 1
134 2
136 2
141 4
142 3
143 2
144 3
145 1
146 1
147 1
151 1
153 1
154 2
156 2
160 2
161 3
163 1
164 1
169 2
172 2
173 3
177 1
178 1
180 1
181 1
182 1
186 2
187 1
188 3
189 2
191 2
192 3
194 2
199 2
203 1
204 1
205 2
206 1
209 1
212 1
214 1
218 2
222 1
224 2
225 2
227 3
232 1
233 2
234 1
235 1
236 1
240 1
251 1
252 1
259 1
262 1
272 2
276 1
281 1
295 1
301 1
302 1
308 1
315 1
320 1
323 1
333 1
334 1
337 1
354 1
358 1
362 2
366 1
368 1
369 1
371 1
373 1
390 1
393 1
404 1
410 1
428 1
432 1
433 1
439 1
453 1
468 1
474 1
488 1
493 1
503 1
508 2
516 1
526 1
533 1
534 1
538 1
549 1
559 1
573 1
587 1
597 1
620 1
632 1
640 1
663 2
672 1
673 1
687 1
718 1
721 1
740 1
756 1
781 1
789 1
797 1
798 1
814 1
816 1
858 1
860 1
869 1
873 1
892 1
931 1
937 1
987 1
993 1
1004 1
1021 1
1024 1
1065 1
1084 1
1111 1
1157 1
1175 1
1207 1
1268 1
1328 1
1498 2
1583 1

Phase

Phase Study_Count
Phase 2 1438
Phase 1 568
N/A 427
Phase 3 396
Phase 1/Phase 2 331
Early Phase 1 57
Phase 4 57
Phase 2/Phase 3 56

Number of Arms

Number_of_Arms Count_of_Studies
1 1676
2 1143
3 174
4 92
5 33
6 18
7 7
8 9
9 4
10 1
11 1
14 2
15 2
18 2
24 1
25 1
37 1
NA 163

Number of Updates

Count of Versions Count of Studies
1 230
2 296
3 299
4 241
5 226
6 193
7 147
8 127
9 125
10 102
11 80
12 70
13 85
14 90
15 65
16 61
17 45
18 48
19 37
20 41
21 31
22 22
23 28
24 28
25 24
26 20
27 22
28 20
29 17
30 21
31 17
32 10
33 17
34 12
35 9
36 9
37 8
38 11
39 9
40 8
41 5
42 8
43 8
44 7
45 9
46 6
47 11
48 6
49 7
50 11
51 6
52 8
53 4
54 5
55 4
56 2
57 6
58 3
59 10
60 4
61 4
62 2
63 7
64 3
65 7
66 5
67 2
68 5
69 5
70 3
71 6
72 9
73 3
74 6
75 4
77 2
79 1
80 7
81 4
82 3
83 1
84 2
85 5
86 3
87 1
88 2
89 3
91 1
92 3
93 2
94 4
95 3
96 2
97 1
98 4
99 2
100 2
101 3
102 5
104 1
105 1
106 1
107 2
108 1
110 1
112 3
115 2
116 1
117 1
118 1
119 2
120 2
121 1
123 2
124 1
125 1
126 2
127 2
128 1
129 1
131 2
135 1
138 3
139 1
141 1
144 1
145 1
152 1
154 2
157 1
164 1
178 1
183 1
192 1
195 1
202 1
203 1
205 2
209 1
213 1
216 1
220 1
221 1
224 1
231 1
234 1
242 1
247 1
251 1
261 1
265 1
268 1
281 1
285 1
287 1
303 1
307 1
324 1
330 1
339 1
342 1
364 1
383 1
397 1
412 1
417 1
424 1
430 1
447 1
463 2
467 1
489 1
500 1
504 1
513 1
532 1
533 1
558 1
560 1
569 1
616 1
654 1
689 1
703 1
704 1
738 1
757 1
879 1
1048 1
1060 1
1145 1
1176 1
1200 1
1412 1
1518 1
1581 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 80421 3100 25.942258
Contacts/Locations 45000 2828 15.912306
Recruitment Status 5680 2737 2.075265
Eligibility 5223 1877 2.782632
Arms 4955 1782 2.780584
Interventions 4955 1782 2.780584
Study Design 4443 2090 2.125837
Study Description 4367 1567 2.786854
Study Identification 4264 1651 2.582677
Outcome Measures 4104 1827 2.246305
None (earliest Version on record) 3330 3330 1.000000
Conditions 2879 1178 2.443973
Oversight 2636 1562 1.687580
Sponsor/Collaborators 2551 1436 1.776462
More Information 1661 343 4.842566
References 1007 552 1.824275
Results 507 507 1.000000
IPDSharing 387 336 1.151786
Baseline Characteristics 206 153 1.346405
Results Submission Events 174 174 1.000000
Reported Adverse Events 144 122 1.180328
Documents 140 136 1.029412
Participant Flow 123 109 1.128440
2020Recruitment Status 1 1 1.000000
Quality Control Review has not concludedReturned: March 20 1 1 1.000000

Enrollment Metrics by Phase

Measure Early.Phase.1 N.A Phase.1 Phase.1.Phase.2 Phase.2 Phase.2.Phase.3 Phase.3 Phase.4
Min. 2.0000 1.000 1.0000 1.00000 1.00000 9.0000 1.0000 1
1st Qu. 13.0000 30.000 18.0000 28.00000 31.00000 70.7500 180.0000 44
Median 20.0000 74.000 28.5000 48.50000 50.00000 130.5000 358.0000 100
Mean 33.4386 634.637 47.4735 84.02121 83.53706 453.7857 498.1454 141
3rd Qu. 35.0000 179.500 45.0000 90.00000 94.00000 400.5000 630.0000 197
Max. 300.0000 154900.000 1260.0000 1732.00000 6452.00000 10000.0000 10000.0000 954

Trial Group Type

group_type Group_Count
Experimental 4225
Active Comparator 778
Placebo Comparator 192
Other 172
NA 163
No Intervention 106
Sham Comparator 10

Intervention Model

intervention_model Study_Count
Single Group Assignment 1852
Parallel Assignment 1312
Sequential Assignment 81
Crossover Assignment 33
NA 29
Factorial Assignment 23

Primary Purpose

primary_purpose Study_Count
Treatment 2954
Diagnostic 149
Supportive Care 62
Prevention 61
Other 35
Basic Science 22
NA 20
Health Services Research 13
Screening 12
Device Feasibility 2

Observational Studies

Studies by Country

Country Study_Count
United States 111
China 46
NA 46
France 40
Germany 28
Canada 17
Spain 15
Japan 12
Italy 11
Korea, Republic of 11
Netherlands 10
Taiwan 8
Belgium 7
Sweden 7
United Kingdom 7
Egypt 6
Hong Kong 5
Switzerland 5
Turkey 4
Denmark 3
Singapore 3
Austria|Germany 2
Czech Republic 2
Czechia 2
Greece 2
Israel 2
Russian Federation 2
Algeria|Egypt 1
Argentina|Austria|China|Colombia|Czech Republic|France|Germany|Greece|Indonesia|Korea, Republic of|Mexico|Netherlands|Philippines|Poland|Russian Federation|Slovakia|Slovenia|Sweden 1
Argentina|Colombia 1
Argentina|France 1
Australia 1
Austria 1
Austria|Belgium|France|Greece|Italy|Netherlands|Spain|United Kingdom 1
Austria|Brazil|Canada|China|Czechia|Denmark|Egypt|France|Greece|Hong Kong|Hungary|India|Indonesia|Israel|Japan|Kazakhstan|Korea, Republic of|Mexico|Netherlands|Pakistan|Poland|Russian Federation|Singapore|Slovakia|Spain|Sweden|Switzerland|Taiwan|Thailand|Turkey|Vietnam 1
Bangladesh 1
Belgium|France 1
Belgium|Netherlands 1
Brazil 1
China|Hong Kong|Japan 1
Croatia 1
Czechia|Germany|Poland|Spain|Switzerland|United Kingdom 1
France|Germany|Italy|United Kingdom 1
Germany|Switzerland 1
India 1
Kenya 1
Malawi 1
Malaysia|Philippines|Singapore|Thailand 1
Martinique 1
Mexico 1
Netherlands|Switzerland 1
Norway 1
Peru|Uruguay 1
Poland 1
Romania 1
Slovakia 1
Spain|Austria|Belgium|Czechia|France|Germany|Greece|Italy|Netherlands|Poland|United Kingdom 1
Taiwan|Thailand 1
Thailand 1
Turkey|United States|Argentina|Austria|Belgium|Colombia|Estonia|Finland|Germany|Greece|Hungary|Israel|Italy|Lebanon|Pakistan|Spain|Taiwan|United Kingdom 1
United States|Argentina|Austria|Belgium|Canada|China|Denmark|Egypt|France|Greece|Italy|Japan|Korea, Republic of|Netherlands|Russian Federation|Saudi Arabia|Spain|Sweden|Taiwan|Thailand|Turkey 1
United States|Canada 1
United States|Canada|China|Colombia|Croatia|Czech Republic|Finland|France|Greece|Hong Kong|Hungary|India|Indonesia|Israel|Italy|Japan|Kazakhstan|Korea, Republic of|Libyan Arab Jamahiriya|Malaysia|Mexico|Norway|Pakistan|Philippines|Portugal|Qatar|Romania|Russian Federation|Singapore|Slovakia|Spain|Sweden|Syrian Arab Republic|Thailand|Ukraine|United Arab Emirates|Uruguay|Venezuela|Vietnam 1
United States|Canada|Hong Kong 1
United States|China 1
United States|Denmark|Finland|Italy|Portugal|United Kingdom 1
United States|France|Germany|Italy|Netherlands|Saudi Arabia|Switzerland|Turkey 1
United States|France|Germany|Italy|Spain 1
United States|France|Germany|Italy|Spain|Taiwan|Thailand 1
United States|Germany|Greece|Italy|Japan|Korea, Republic of|Spain 1

Sites per Study

Site_count Study_Count
1 345
2 22
3 12
4 8
5 7
6 3
7 5
8 3
9 1
10 3
11 1
12 1
13 3
14 3
15 2
16 3
17 1
18 4
19 1
21 1
23 1
27 1
28 1
30 1
31 1
34 2
37 2
41 1
42 1
46 1
52 1
57 2
60 1
66 1
75 2
82 1
108 1
110 1
144 2
167 1
182 1
187 1
231 1

Number of Updates

Count of Versions Count of Studies
1 99
2 73
3 51
4 44
5 29
6 25
7 19
8 14
9 8
10 6
11 9
12 9
13 2
14 4
15 2
16 3
17 5
18 1
19 1
20 3
22 1
23 2
24 2
25 2
28 1
29 1
32 3
33 1
34 3
35 1
36 1
37 1
38 2
39 2
40 2
42 2
48 1
52 2
54 1
56 2
60 1
61 1
63 2
72 2
80 1
81 1
93 1
106 1
109 1
122 1
123 1
145 1
157 1
189 1
232 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 4355 358 12.164805
Contacts/Locations 1488 278 5.352518
Study Description 499 135 3.696296
Recruitment Status 469 271 1.730627
None (earliest Version on record) 457 457 1.000000
Study Design 420 235 1.787234
Eligibility 272 141 1.929078
Study Identification 217 127 1.708661
Sponsor/Collaborators 190 134 1.417910
Outcome Measures 186 126 1.476190
Groups 140 89 1.573034
Interventions 140 89 1.573034
Oversight 116 95 1.221053
Conditions 115 68 1.691177
References 91 55 1.654546
IPDSharing 26 23 1.130435
Results 17 17 1.000000
Documents 11 10 1.100000
More Information 10 6 1.666667
Results Submission Events 9 9 1.000000
Participant Flow 3 3 1.000000
Baseline Characteristics 1 1 1.000000
Reported Adverse Events 1 1 1.000000

Enrollment Metrics

Measure Observational
Min 1.000
1st Qu 52.250
Median 133.000
Mean 2251.692
3rd Qu 400.000
Max 741379.000

Observation Model

observational_model Study_Count
Cohort 270
Case-Only 89
Case-Control 37
Other 24
NA 17
Case Control 11
Ecologic or Community 4
Family-Based 3
Defined Population, Natural History 2

Time Perspective

time_perspective Study_Count
Prospective 305
Retrospective 107
Cross-Sectional 23
Other 12
NA 7
Cross-Sectional, Prospective 1
Longitudinal, Prospective 1
Longitudinal, Retrospective/Prospective 1

Registries

Studies by Country

Country Study_Count
United States 5
Italy 4
China 3
Germany 3
NA 3
Spain 3
Korea, Republic of 2
Argentina 1
France 1
Norway 1
Switzerland 1

Sites per Study

Site_count Study_Count
1 20
2 1
5 2
6 1
15 1
25 1
27 1

Number of Updates

Count of Versions Count of Studies
1 2
2 9
3 2
4 1
5 3
6 3
7 2
8 1
12 1
18 1
24 1
39 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 151 25 6.040000
Contacts/Locations 44 14 3.142857
None (earliest Version on record) 27 27 1.000000
Recruitment Status 18 12 1.500000
Study Design 18 11 1.636364
References 16 6 2.666667
Sponsor/Collaborators 15 7 2.142857
Outcome Measures 13 11 1.181818
Study Description 13 8 1.625000
Eligibility 11 9 1.222222
Groups 11 10 1.100000
Interventions 11 10 1.100000
Conditions 10 6 1.666667
IPDSharing 7 6 1.166667
Study Identification 7 7 1.000000
Oversight 2 2 1.000000

Enrollment Metrics

Measure Registries
Min 20.00
1st Qu 105.50
Median 306.00
Mean 1484.63
3rd Qu 1500.00
Max 10000.00

Registry Model

observational_model Study_Count
Cohort 18
Case-Only 5
Case-Control 2
Other 1
NA 1

Time Perspective

time_perspective Study_Count
Prospective 25
Other 1
NA 1

Follow-up

target_duration Study_Count
3 Years 5
5 Years 4
10 Years 3
3 Months 2
36 Months 2
12 Months 1
15 Years 1
2 Years 1
24 Months 1
25 Years 1
3 Days 1
4 Years 1
6 Years 1
62 Months 1
7 Years 1
9 Months 1